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Table 4 Descriptive statistics for citation counts

From: Three options for citation tracking: Google Scholar, Scopus and Web of Science

   Oncology CM physics
   Google Scholar Scopus Web of Science Google Scholar Scopus Web of Science
1993 Mean 20.8 35.4 45.3 10.3 N/A 22.5
  St. Dev. 37.9 60.7 77.4 20.7 N/A 32.5
2003 Mean 6.2 8.9 8.3 2.2 2.2 3.9
  St. Dev. 8.0 12.0 10.9 3.7 2.7 4.9